The section, EDAIC part-1: Questions and explanations, covers a different topic each day with the intent that candidates can prepare one small topic each day, making steady progress in their exam preparation.
Question: True statements regarding cerebral blood flow
- Normal resting value: 50 ml/100grams/minute
- Values at peak exercise: 30ml/100grams/minute
- Blood flow to grey matter is 3 to 4 times less than the flow to white matter
- The sympathetic nervous system exerts the predominant control on regional supply
- Stays constant between SBP of 50 to 150 mmHg
Answers:
- true
- false
- false
- false
- false
Explanation:
The normal cerebral blood flow is approximately 50ml/100g/min or 700 ml/min, which is roughly 14 % of the cardiac output. This ranges from 20ml/100g/min in white matter to 70ml/100g/min in grey matter.
Exercise does not cause a significant decrease in CBF; it is maintained at basal levels.
Normally autoregulation maintains a constant blood flow between MAP 50 mmHg and 150 mmHg. However, in traumatised or ischaemic brains, CBF may become blood pressure-dependent.
Regional blood flow is tightly coupled to brain metabolism. Energy metabolites cause local vasodilatation, assisting with rapid regional control of CBF. SNS has very marginal control in regional blood supply.
Mock-tests for EDAIC multiple choice questions (part-1) are now available for your practice and making you familiar with the exam pattern, and complexity. The practice will come in handy when the final exam FINALLY arrives. The tests have been launched keeping in mind the much needed last-minute practice and revision required for September 2021 exam.
You can take the test and gauge your preparation level. Detailed explanations are also available for desiring candidates. The exam result will be emailed to you with or without explanations as per your result.
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The ‘EDAIC part-1: Questions and explanations’ section covers a different topic each day with the intent that candidates can prepare one small topic each day, making steady progress in their exam preparation.
EDAIC Part-1 Mock-test (1), Paper A with MCQ explanations.
